664169040305 has 16 divisors (see below), whose sum is σ = 815676960384. Its totient is φ = 518890041600.

The previous prime is 664169040299. The next prime is 664169040347. The reversal of 664169040305 is 503040961466.

664169040305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664169040305 - 2⁴ = 664169040289 is a prime.

It is a super-2 number, since 2×664169040305² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1013705 + ... + 1534905.

It is an arithmetic number, because the mean of its divisors is an integer number (50979810024).

Almost surely, 2^664169040305 is an apocalyptic number.

It is an amenable number.

664169040305 is a deficient number, since it is larger than the sum of its proper divisors (151507920079).

664169040305 is a wasteful number, since it uses less digits than its factorization.

664169040305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527176.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 664169040305 in words is "six hundred sixty-four billion, one hundred sixty-nine million, forty thousand, three hundred five".